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CLIN CANCER RES:BAP1是HPV阴性头颈部肿瘤的理想靶点

2018-02-25 MedSci MedSci原创

CLIN CANCER RES近期发表了一篇文章,研究核去泛素化酶BRCA1相关蛋白1(BAP1)在头颈部肿瘤放疗抵抗中所扮演的角色。

CLIN CANCER RES近期发表了一篇文章,研究核去泛素化酶BRCA1相关蛋白1(BAP1)在头颈部肿瘤放疗抵抗中所扮演的角色。

作者选择了6个头颈部鳞状细胞癌细胞系,3个为HPV阴性,3个为HPV阳性。通过过表达、敲除和再表达BAP1在体外和头颈部鳞状细胞癌异种移植模型中研究其对放疗敏感性的影响。使用克隆细胞存活和肿瘤生长延缓实验评估放疗敏感性。使用免疫荧光和Western blot分析蛋白表达改变。作者还利用数据库研究BAP1表达和患者结局之间的关系。研究结果发现,BAP1过表达在细胞系和异种移植模型中均会诱导放疗抵抗,而BAP敲除则可以诱导组蛋白H2A泛素化,是DNA修复的标志。进一步研究还发现BAP1缺失会影响BRCA1 foci构型,与同源重组(HR)有关,但是对γ-H2AX foci影响很小,且不会影响与非同源末端连接有关的蛋白。这些结果表明BAP1通过调节头颈部鳞状细胞癌中的HR来影响放疗敏感性。最后,在头颈部鳞状细胞癌患者中,BAP1过表达与更高的放疗失败率有关。

文章最后认为,BAP1可以诱导头颈部鳞状细胞癌细胞放疗抵抗,可能是通过H2Aub去泛素化和调节HR产生影响,与头颈部鳞状细胞癌患者不良预后有关。BAP1可能会成为头颈部鳞状细胞癌的治疗靶点。

原始出处:
Xiyou Liu,Manish Kumar,et al.BAP1 Is a Novel Target in HPV-Negative Head and Neck Cancer.CLIN CANCER RES.February 2018 doi:10.1158/1078-0432.CCR-17-1573

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    2018-02-27 wshxjq
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    2018-02-26 清风拂面

    谢谢分享学习

    0

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    2018-02-25 天涯183

    非常好的文章.学习了

    0

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